Electrical receiver apparatus



Sept. 28 1926. 1,601,413

1 v A. P. PlNKLER ELECTRICAL RECEIVER APPARATUS Filed March 17, 1926 INVENTOR W W ATTORNEY Patented Sept. 28, 1926.

-QUNITED STATES PATENT OFFICE.

ARTHUR P. PINKLER, OF WATERBURY, CONNECTICUT, ASSIGNOR TO' THE BRISTOL COMPANY, OF WATERBURY, CONNECTICUT, A CORPORATION OFCONNECTICUT.

ELECTRICAL RECEIVER APPARATUS.

Application filed March 17, 1926. Serial Np. 95,498.

The invention relates to electrical receiver apparatus for amplifying sounds, more particularly to the movement portion thereof whereby a diaphragm or like member is vi brated strength of the actuating current thereto.

It has for its object to improve the quality of reproduction and more especially in rendering the high and low frequency vibra tions with equal fidelity. er to this end is constructed on the vibratory reed principle, the reed being secured within the arms of a' permanent U-shape magnet between the top and bottom thereof instead of at the bottom of the magnet as has been the practice heretofore.

The nature of-the invention, however, will best be understoodwhen describedin con nection with the accompanying drawings, in which Fig. .1 is a plan of the novel receiver movement, and Figs. 2 and 3 are respectively a front and a side elevation of the novel receiver movement.

Fig. 4 is a vertical section.

Referring to the drawings, 10 designates in accordance with the variations in supplied a U-shape permanent magnet of substantial proportionshaving the'two arms 11 and 12. To the respective tops of the two arms are attached and inwardly directed two pole pieces or'shoes 13 and 14 of soft iron with intermediate air gap left therebetween and thru which and the pole pieces the magnetomotive force of the permanent magnet may be transmitted.

Substantially mid-way of the arms 11 and 12 is provided a magnetic shunt in the nature of further soft iron pieces orbrackets 15 and 16 directed inwardly toward each other with a small space 17 left therebetween. Thru this space is designed to pass the vibratory reed 20 which is in the nature of any iron rod or bar, preferably of rectangular section, and having anenlargement or collar 21 soldered or otherwise secured thereto near The novel receiv of the reed serves to draw up the latter by engagement with the under faces of the members 1516. In this manner, not only is the reed securely held and positioned with respect to its cooperating pole shoes 13 and 14, but at the same time a magnetic bridge '01 shunt is afforded thereto across the arms 11 and by the nut 22, thus completing a path for the magnetomiotive forceand in cluding said members 15-16, the upp r portions of'arms 11 and 12, the pole shoes 131.4 and the slight air gaps between the outer end of the reed and the respective fac of the pole shoes 13+14 between which it is designed to vibrate.

Vibra-tion thereofis effected in the usu. manner thru variations in the actuating current supplied and passing thru a modulating coil or coils or electro-magnet 25,'shown mounted about the reed 20 between the pol pieces and the shunt members. This co; may conveniently be mounted by means of a brass bracket member 26, as in-dicated, a circular indentation 27 beingprovided intermediate the ends of the arms for supporting the upper of the two coils, when two are employed, and providing also for the proper spacing between the same. The said bracket may be secured in position thru an extension arm 28 which is bent laterally to fit under the nut 23, thus affording convenient assembly of the mechanism.

By thus materially shortening the length of the reed and consequently its mass, the inertia thereof is appreciably reduced; and the action of said reed is much more efficient in the reproduction of vibrations resulting from variations in the actuating current prevailing in the coil 25. The vibrations thereof may be communicated to some external vibrating membrane or surface (not shown) as thru a rod 30securely attached thereto in manner well understood for converting and amplifying the mechanical vibrations of said reed into sound vibrations. The reed thus mounted is especially well held and located in its mid-position between the pole shoes 13 and 14 and responds with remarkable fidelity to vibrations of both high and-low frequency.

j 1. Receiver mechanism for sound amplifier devices, comprising a U-shape permanent magnet, a pair of soft ironpole piecesand intermediate secured to and directed inwardly from the ends of the arms of said magnet, a pair of soft iron brackets secured intermediate the top and bottom of the permanent magnet to the respective inner faces of the arms thereof, an iron reed member extending therefrom between the said pole pieces, an electro-magnet about said reed and carried by the bracket portions, and an actuating arm secured to said reed and projecting therefrom at right angles. r

2. Receiver mechanism for sound amplifier devices, comprising a U-shape permanent magnet, a pair of soft iron pole pieces secured to and directed inwardly from the ends of the arms of said magnet, a magnetic shunt between the arms of said permanent magnet its top and bottom, a reed member secured thereto and extending between said pole pieces, an electr-o-magnet about said reed and carried by the magnetic shunt, and an actuating arm secured to said reed and projecting therefrom at right angles.-

4 3. Receiver mechanism for sound amplifier devices, comprising a U-shape permanent magnet, a pair of soft iron pole pieces securedto and directed inwardly from the ends of the arms of said magnet, a pair of soft iron brackets secured intermediate the top and bottom of the permanent magnet to the respective inner faces of the arms thereof, inwardly directed therefrom with the inner ends spaced a slight distance apart, an iron reed member secured to the said inwardly directed-brackets and extending between the same and the said pole pieces, means to secure .the reedmember to said brackets and effecting a magnetic bridge therebetween, an electro-magnet about said reed and carried by the bracket portions,

bracket members, an electro-magnet ab and an actuating arm secured to said reed and projecting therefrom at right angles.

4s-Receiver mechanism for sound amplifier devices, comprising a U-shape permanent magnet, a pair of soft iron pole pieces secured to and directed inwardly from the endsof the arms of said magnet, a pair of soft iron brackets secured intermediate the top and bottom of the permanent magnet to the respective inner faces ,of the arms thereof, inwardly directed therefrom with the inner ends spaced a slight distance apart, an iron reed member extending between the same and the said pole pieces and means to secure the portions of the said bracket members and including a soft iron nut resting upon bridging or shunting sa d bracket members, and

a. further nut working on theinner end 0 saidreed to draw up the latter against the out said reed and carried by the bracket portions, and anactuating armesecured to said reed and projecting therefrom at right angles.

5. Receiving mechanism for sound amplifier same to the inwardly directed devices, comprising a U-shape permanent.

magnet, a pair of soft iron pole pieces secured to and directed inwardly from theends of the arms of said magnet, a magnetic shunt between the arms of said permanent magnet and intermediate its top and bottom, ,a reed secured thereto and extending between said pole pieces, a brass spacing bracket carried by said inwardlydirected shunting brackets, cargied thereby and mounted about said ree In testimony whereof I ture.

ARTHUR PINKLEB.

and an electro-magnet 

